/ *以C编写的简单同步XML-RPC客户端程序，作为Xmlrpc-c客户端。这将调用sample.add过程，Xmlrpc -c服务器提供的xmlrpc_sample_add_server.c示例。
   这会将RPC发送到在本地系统（“ localhost”）上运行的服务器，HTTP端口8080。
   该程序使用Xmlrpc-c全局客户端，该客户端使用默认的客户端XML传输。
*/

#include <stdlib.h>
#include <stdio.h>
#include <xmlrpc-c/base.h>
#include <xmlrpc-c/client.h>
#include "config.h"  /* information about this build environment */
#define NAME "Xmlrpc-c Test Client"
#define VERSION "1.0"
static void
dieIfFaultOccurred (xmlrpc_env * const envP) {
    if (envP->fault_occurred) {
        fprintf(stderr, "ERROR: %s (%d)\n",
                envP->fault_string, envP->fault_code);
        exit(1);
    }
}
int
main(int           const argc,
     const char ** const argv) {

    xmlrpc_env env;
    xmlrpc_value * resultP;
    xmlrpc_int32 sum;
    const char * const serverUrl = "http://localhost:8080/RPC2";
    const char * const methodName = "sample.add";
    if (argc-1 > 0) {
        fprintf(stderr, "This program has no arguments\n");
        exit(1);
    }
    /* Initialize our error-handling environment. */
    xmlrpc_env_init(&env);
    /* Create the global XML-RPC client object. */
    xmlrpc_client_init2(&env, XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION, NULL, 0);
    dieIfFaultOccurred(&env);
    printf("Making XMLRPC call to server url '%s' method '%s' "
           "to request the sum "
           "of 5 and 7...\n", serverUrl, methodName);

    /* Make the remote procedure call */
    resultP = xmlrpc_client_call(&env, serverUrl, methodName,
                                 "(ii)", (xmlrpc_int32) 5, (xmlrpc_int32) 7);
    dieIfFaultOccurred(&env);
    /* Get our sum and print it out. */
    xmlrpc_read_int(&env, resultP, &sum);
    dieIfFaultOccurred(&env);
    printf("The sum is %d\n", sum);
    /* Dispose of our result value. */
    xmlrpc_DECREF(resultP);
    /* Clean up our error-handling environment. */
    xmlrpc_env_clean(&env);
    /* Shutdown our XML-RPC client library. */
    xmlrpc_client_cleanup();
    return 0;
}